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Briefly explain the relationships between the index and the sample characteristics.

Briefly explain the relationships between the index and the sample characteristics.

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Briefly explain the relationships between the index and the sample characteristics. 

(ii) Cetane index (CI) is a quality indicator for diesel fuel. It can be calculated based on the distillation characteristics and density according to ASTM D976. ASTM D976 Cetane Index = 454.74 – 1641.416 D + 774.74 D² – 0.554 T50 + 97.803 (log T50)² where D: Density at 15 °C, g/mL T50: The temperature at which 50% of the fuel evaporates, °C The density and distillation temperature for 2 diesel samples are tabulated Table 3. Calculate the CI of these samples. Table 3 Sample D, g/mL То, °С CI 1 0.8491 290 51.9377 0.9210 290 32.5212
Transcribed Image Text:(ii) Cetane index (CI) is a quality indicator for diesel fuel. It can be calculated based on the distillation characteristics and density according to ASTM D976. ASTM D976 Cetane Index = 454.74 – 1641.416 D + 774.74 D² – 0.554 T50 + 97.803 (log T50)² where D: Density at 15 °C, g/mL T50: The temperature at which 50% of the fuel evaporates, °C The density and distillation temperature for 2 diesel samples are tabulated Table 3. Calculate the CI of these samples. Table 3 Sample D, g/mL То, °С CI 1 0.8491 290 51.9377 0.9210 290 32.5212
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